CVE-2026-63993

9.8 Critique

Publiée le 19/07/2026 à 18:17 · Modifiée le 19/10/2026 à 23:17 · Modifiée · Source : 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Description

In the Linux kernel, the following vulnerability has been resolved: vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu() skb_tunnel_check_pmtu() can change skb->head. Reusing old_iph afer skb_tunnel_check_pmtu() can cause an UAF. Use instead ip_hdr(skb) as done in drivers/net/bareudp.c and drivers/net/geneve.c. Found by Sashiko.

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Produits concernés

Linux
Linux linux kernel

Scores CVSS

Version	Score	Source	Vecteur
3.1	9.8 Critique	416baaa9-dc9f-4396-8d5f-8c081fb06d67	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Faiblesses (CWE)

CWE-416

Références

https://git.kernel.org/stable/c/5303925e360527243b46a440a04667826bbc72b7 Patch
https://git.kernel.org/stable/c/609e63312c29aad18026a1d3222e123d4b6b0feb Patch
https://git.kernel.org/stable/c/6b8bfce9d2f774d2c2243e0248e03efb99bba6c0 Patch
https://git.kernel.org/stable/c/7d9ef0cb271555d8cf39fefe6c981e1493b25ecf Patch
https://git.kernel.org/stable/c/8d435d68d71fb875876b722f4136caf74f2f48bd Patch
https://git.kernel.org/stable/c/9257f56ac47ef1976bcd056cf986a9988eeec67a Patch
https://git.kernel.org/stable/c/a493efd4336cf19122ae0e4cbb3d31b32d70deea Patch
https://git.kernel.org/stable/c/dc3bfa050f873371e745bdf478b1f5b738e5733d Patch

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories